Compressor



sept. 24, 1929.

Flql.

c. P. EISENHAUER 1,729,420

COMPRESSOR Filed Aug. 15, 1927 4 Sheets-Sheet l Jrvuemar/ CHARLES P, E Isn/HA UER,

Sept. 24, 1929. c. P. Elsr-:NHAUER COMPRES S OR Filed Aug. l5. 1927 4 Sheets-Sheet Jn/uowrr/ CHAR/ ES P. E/sEA/HAl/ER BY Mm sept- 24, 1929. CJP. ElsENHAUl-:R 1,729,420

COHPRESSOR Filed Aug. 15. 1927 4 Sheets-sneer 3 u UHAR-Lrs PE'lseNHa um,

Sept. 24, 1929. c. P. EISENHAUER COMPRESSOR Fil-ed Aug- 15, 1927 4 Sheets-Sheet 4 Jrwevvv CHARLES -RE/sENHm/ER,

, Patented sept'. 24, 1929 UNITED STATES PATENT .OFFICE CHARLES r. EISENHAUER, OF DAYTON, OHIO, AssIGNOR To TRE DURO OOMPANY, OF DAYTON, OHIO, A CORPORATION or OHIO f COMPRESSOR Application led August 15, 1927. Serial No. 212,886.

.continuously rotating driving member.

It is a further object of my invention to provide such means in combination with a direct electric drive and in combination with lo means for cooling the gas or fluid so handled. It is a further object to provide a single unitary cpnstruction-Within a single housmg, mounted on a single foundation from which the motor fluid or gas actuating units may l readily be detached When the unitary cover 1s removed. Referring to the drawings: Figure 1 is a-section through a part of the motor, the circulating pipes,y gas or fluid,l clrculating mechanism andthe housing on the line 1--1 of Figure 2;

. Figure 2 is an end elevation from the circulating end of the complete apparatus;

Figure 3 is an enlarged section of the gas or fluid circulating mechanism on the line 3 8 of Figure 2 Figure 4 is 'a section on the line 4 4 of Figure '3; i

Figure 5 is a section on the line 5-'5`of Figure 1 looking in the direction of the pistons. Referring'to the drawings in detail, 1 is the foundation for the complete apparatus, which foundation or platform has a marginal up-A standing flange or rib 2. On the floor of this B5 foundation 1 are a pair of spaced supporting arms 3 arranged in pairs at either end of the platform or base andA having on their upper ends'the fore and aft supporting rails 4, the

ends of which are mounted'upon the respec- 1,0 tive supports 3 on either end of either side of the platform 1. Upon these supporting ralls 4 is mounted the electric motor 5 and the housing of the compressor 6. Thus, these two units can he detached and moved therefrom 15 when desired, but, when theyA are in position,

they are maintained in a predetermined position with respect to the cover 6 and a plurality Of circulating coils 7 which surround them. As the electric motor and the-oom- 30 presser aredirectly connected, these supportpipes 7 are spaced one so that a Vcarried in the spider at 25, which head is ing rails, upon the common base, provide for perfect alignment of the several parts. The cover 6 is mounted on the base and provided With louvers 8 at either end thereof so that air may be'circuilated over the motor 5 and compressor 6 bythe fan mounted on the armature shaft 10 of the electric motor. The

v `from one anotherlby the spacer bars 11. 'i

This armature shaft 10 carries on itsl outer end a driving screw consisting of a' sleeve'12 and a screwI 13. This screw is adapted to turn With-in a slot in insert 14 in the cylindrical pis'- lton land is yieldingly held in such a position by the cylindrical plunger 16 working Within that piston and impelled against the screwby the internally-located helical spring' 17, one end of which abuts against thebottom of the cup-shaped plunger 16 and the other .against the externallyethreaded Iend plate 18 of the piston 15.

The turn of the screw 13 reciprocates the piston 15- Within the cylinder 19, of which pistons there are a plurality arranged about the circumference of the cylinder block 20 near the periphery thereof. As the screw turns, these pistons are reciprocated one by continuous flowA of gas o r fluid will be caused.

Thepiston 15 carries at its end opposite to the screw end a. spider 21 between the arms of which are the ports 22 which are adapted to be sealed by the valveplate-23, the reciprocation of Whichis limited by the screw head 24 spaced from the spider a distance sufficient for the plate 23 to move backwardly and for- Wardly, such plate being journaled or supported upon the shaft of the screw, asat 26. 'lhe slots 14 in the insert 14 act as inlet ports 90 to the interior of the pistons 15. The air or gas or Huid passing into the cylinder 19 when the piston is Withdrawn will pass through the ports 22 beneath the plate 23 into the compression passageways 27, within a cylinder member 28 in the center of which is carried 'a second screw 29 having a spaced head 30 and a valve plate 31 mounted thereon adapted to close the passageways 27. This valve plate is yieldingly maintained in closed position by a helical spring 32, one end of which engages said plate 31 and the other end seated vagainst the interior Wall of the chamber 33 of the cylinder head 34. Thus, on the return stroke of the piston the gas or fluid contained Within the cylinder 19 is compressed by the piston which is sealed therefrom by the plate 23, lifting the plate 31 against the spring 32 and forcing the fluid or gas into the pipe 36. The gas thus delivered to the head opens a ball valve 48 and then passes into al pipe 49 by Which it is delivered to` a charnber 38. yThis chamber is formed by the housing 39 which is an integral part of the cylinder block, in Which aremlocated the cylin- `ders 19. This cylinder blockis provided with a plurality of ribs 40 for radiatingheat.

- The bottom of the chalnber 38 is filled with lubricant 41 through the ller opening 42,

AWhich lubricant is supplied by the Wick 43 which one at least is always in operation so that there -Will be. an even and continuous positive flow of gas or fluid through the system. By having a common motor frame 45 to which is bolted by the bolts 46 the casing 39 and the cylinder block 20 with the cylinder head 34, I am able to provide a fully aligned apparatus. The gas-tight bearing mechanism is carried in the end of the cage of/the motor andthe cages are connected together by the bolts 47. f

It will be understood that I desire to comprehend Within my invention such modifications as may be necessary to adapt it to varying conditions and uses. Y

By screw or Worm I mean placing a half of 'a right hand screw and a half of a left hand screw together so that the ends meet.

The circuit of the gas is as follows: Gas or fluid enters through the pipe 36 from the source of supply into the distributor head 35, ugnseating the ball valve 48 and then passes through the pipe 49 which leads to the chambe1138, Fig. 3. From the chamber 38 the gas passes around the sleeve 12 and screw 1 3 through one of the openings 14a into a piston 15, thence through the ports 22 into the cylinder, the return stroke of the piston compressing the gas in the cylinder and opening the valve 31, thereby allowing the gas to pass from the cylinder head into a port 34a passing above said base and beneath said supy porting rails and spaced from said .motor and compressor, and a fan carried by ysaid motor.

2. In combination, a common base, a pluiality of standards, supporting rails supported thereby, a motor and compressor resting thereon, a plurality of cooling pipes Wound around said motor and compressor, passing above said base and beneath said supporting rails and spaced from said motor and compressor, and a fan carried by said motor, and a case mounted on said common base having louvers at either end for the circulation of air therethrough.

3. In a compressor, a base, a plurality of standards supported thereby, supporting rails on said standard, a motor and a compressor on said rails in operative alignment with each other, and a plurality of cooling pipes Wound around said motor and compressor and passing above said base and bef neath said rails and spaced from said motor and compressor.

In testimony whereof, I aiix my signature.

CHARLES P. EISENHAUER. 

